Unreal Engine Issues

Sprite does not have a UV1 G channel.

The R channel of UV1 is not a problem. ...

Ensure occurs if the decal scale is set to a very small value

The variable emitting this ensure (RelativeWorldToDecalMatrix) is not actually used, so this line can be removed. FDeferredDecalPS::SetParameters ... const FLargeWorldRenderPosition AbsoluteOri ...

HLOD build fails depending on the value of Loading Range in the World Settings

HLOD actors are generated on the outliner, but no geometry is generated. An error occurs in the output log. ...

Crash while using Geometry Scripting to add an Array of Vector 2D data to 'Append Buffers to Mesh' node UV0 input pin

Geometry Scripting plugin isn't available for 4.27.2, and the behavior is the same 5.0.1. Crash while using Geometry Scripting to add an Array of Vector 2D data to 'Append Buffers to Mesh' node UV0 ...

Emissive is disabled by AO when Allow static lighting is disabled

C++ Actor Component is removed from Actors in scene when the Editor is restarted

This is a regression tested in //UE4/Release-4.27 CL#18319896 C++ Actor Component is removed from Actors in scene when the Editor is restarted. ...

GPU Lightmass ignores IES Profiles on Static Lights while building lighting

This is a regression tested in //UE4/Release-4.27 CL#18319896 GPU Lightmass ignores IES Profiles on Static Lights while building lighting. Tested with different Global Illumination and Reflection s ...

Some Niagara Fluid systems are not visible in a packaged project

Previously packaging caused a crash with this system. This was fixed, but now the system is no longer visible when packaged. ...

Crash when changing details of an animation in an Animation Composite

This is a regression tested in //UE4/Release-4.27 CL#18319896 Fatal error is thrown and the Editor crashes when changing details of an animation in an Animation Composite. ...

Improper include generated when C++ class is in a subdirectory

This is not a regression from 4.27.2, however, a similar issue was fixed in 4.26. Generating a C++ class that is in a subdirectory generates the #include "Subdirectory/Class.h" instead of #include ...